65669472 has 144 divisors (see below), whose sum is σ = 214643520. Its totient is φ = 18835200.

The previous prime is 65669459. The next prime is 65669473. The reversal of 65669472 is 27496656.

It is a tau number, because it is divible by the number of its divisors (144).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65669473) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 59647 + ... + 60737.

It is an arithmetic number, because the mean of its divisors is an integer number (1490580).

Almost surely, 2^65669472 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 65669472, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (107321760).

65669472 is an abundant number, since it is smaller than the sum of its proper divisors (148974048).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

65669472 is a wasteful number, since it uses less digits than its factorization.

65669472 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1137 (or 1126 counting only the distinct ones).

The product of its digits is 544320, while the sum is 45.

The square root of 65669472 is about 8103.6702795709. The cubic root of 65669472 is about 403.4482550893.

The spelling of 65669472 in words is "sixty-five million, six hundred sixty-nine thousand, four hundred seventy-two".